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Subject[PATCH] pata_hpt366: add hpt36x_find_mode() helper
Date
From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Subject: [PATCH] pata_hpt366: add hpt36x_find_mode() helper

Factor out code for finding the register programming information
from hpt366_set_mode() to hpt36x_find_mode().

This makes pata_hpt366 driver more similar to pata_{37x,3x2n} ones.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
pata_hpt{37x,3x2n} drivers can also be made to use *set_mode()

earlier references:
https://lkml.org/lkml/2009/11/27/241

drivers/ata/pata_hpt366.c | 35 +++++++++++++++++++++++++----------
1 file changed, 25 insertions(+), 10 deletions(-)

Index: b/drivers/ata/pata_hpt366.c
===================================================================
--- a/drivers/ata/pata_hpt366.c
+++ b/drivers/ata/pata_hpt366.c
@@ -111,6 +111,28 @@ static const struct hpt_clock hpt366_25[
{ 0, 0x01208585 }
};

+/**
+ * hpt36x_find_mode - find the hpt36x timing
+ * @ap: ATA port
+ * @speed: transfer mode
+ *
+ * Return the 32bit register programming information for this channel
+ * that matches the speed provided.
+ */
+
+static u32 hpt36x_find_mode(struct ata_port *ap, int speed)
+{
+ struct hpt_clock *clocks = ap->host->private_data;
+
+ while (clocks->xfer_mode) {
+ if (clocks->xfer_mode == speed)
+ return clocks->timing;
+ clocks++;
+ }
+ BUG();
+ return 0xffffffffU; /* silence compiler warning */
+}
+
static const char * const bad_ata33[] = {
"Maxtor 92720U8", "Maxtor 92040U6", "Maxtor 91360U4", "Maxtor 91020U3",
"Maxtor 90845U3", "Maxtor 90650U2",
@@ -210,10 +232,9 @@ static int hpt36x_cable_detect(struct at
static void hpt366_set_mode(struct ata_port *ap, struct ata_device *adev,
u8 mode)
{
- struct hpt_clock *clocks = ap->host->private_data;
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
u32 addr = 0x40 + 4 * adev->devno;
- u32 mask, reg;
+ u32 mask, reg, t;

/* determine timing mask and find matching clock entry */
if (mode < XFER_MW_DMA_0)
@@ -223,13 +244,7 @@ static void hpt366_set_mode(struct ata_p
else
mask = 0x30070000;

- while (clocks->xfer_mode) {
- if (clocks->xfer_mode == mode)
- break;
- clocks++;
- }
- if (!clocks->xfer_mode)
- BUG();
+ t = hpt36x_find_mode(ap, mode);

/*
* Combine new mode bits with old config bits and disable
@@ -237,7 +252,7 @@ static void hpt366_set_mode(struct ata_p
* problems handling I/O errors later.
*/
pci_read_config_dword(pdev, addr, &reg);
- reg = ((reg & ~mask) | (clocks->timing & mask)) & ~0xc0000000;
+ reg = ((reg & ~mask) | (t & mask)) & ~0xc0000000;
pci_write_config_dword(pdev, addr, reg);
}


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